[US, WI] I own a house that I've been consistent on paying all associated bills on, property management companies trying to to buy my house do not take no for an answer

I own a modest home in WI, and I have family who aren't on the deed in NJ and DE who are getting an alarming number of phone calls from multiple companies looking to buy my home, and this is after a lot of them have called me directly and I told them I wasn't interested in selling. Is there any recourse I can take before going straight to an attorney? I plan on doing so regardless.